From 1c87733d0682547050ccccb400cdac425fa43b39 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Mon, 25 Oct 2010 03:20:11 +0000 Subject: [PATCH] net_ns: add __rcu annotations add __rcu annotation to (struct net)->gen, and use rcu_dereference_protected() in net_assign_generic() Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- include/net/net_namespace.h | 2 +- net/core/net_namespace.c | 4 +++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 65af9a0..1bf812b 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -88,7 +88,7 @@ struct net { #ifdef CONFIG_WEXT_CORE struct sk_buff_head wext_nlevents; #endif - struct net_generic *gen; + struct net_generic __rcu *gen; /* Note : following structs are cache line aligned */ #ifdef CONFIG_XFRM diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index c988e68..3f86026 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -42,7 +42,9 @@ static int net_assign_generic(struct net *net, int id, void *data) BUG_ON(!mutex_is_locked(&net_mutex)); BUG_ON(id == 0); - ng = old_ng = net->gen; + old_ng = rcu_dereference_protected(net->gen, + lockdep_is_held(&net_mutex)); + ng = old_ng; if (old_ng->len >= id) goto assign; -- 2.7.4